In this case it is also referred to as cryptogenic, in which genetic and sometimes hereditary influences play a role.

He owes nothing to hereditary influence.

There is plenty of on-the-page psychotherapy here, except when there is not: "Don't believe that stuff about hereditary influences affecting the child.

This degeneration can be passed from generation to generation, resulting in imbecility and senility due to hereditary influence.

This is the first time a specific gene has been linked to the disorder, and it's a major step in sorting out the hereditary influence on bone mass.

There is little evidence concerning the impact of hereditary influence in rumination syndrome.

Hygienists spoke of the need to grasp the actual moment when the nerve centres of life were poisoned through hereditary influence or degenerate living.

While arguing for hereditary influence, he believed, from his own family experience, that fears of lightning and snakes were taught, rather than inherited.

This carried a great deal of weight, as it was thought during this time that both drink and hereditary influence were strong causal factors for insanity.

The cause of Crohn's disease is unknown, although there appears to be some hereditary influence involved.